OBD-II Code · Powertrain
P0717
Input Turbine Speed Sensor "A" No Signal
Severity
high
Left alone, this one tends to take other parts with it.
Can you drive it
Not for long
Driving on this one risks further damage. Get it to a shop rather than carrying on with it.
Indicative cost (USD)
$200–$1,500
Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
PCM is not seeing any input speed signal from the transmission.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then work the likely-causes list in the order shown.
That order is what a shop checks first for this code — wiring and connections before the component they run to, because a connector costs nothing to inspect and is a common answer.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Limp mode (often stuck in 3rd or 2nd)
- No upshift
Likely causes
- Failed input speed sensorMost common
- Wiring open
- Internal trans issue
Read the full diagnostic procedureP0717 sets when the TCM commands the engine to be running and producing torque (engine RPM above roughly 400) but the input/turbine speed sensor repo…
P0717 sets when the TCM commands the engine to be running and producing torque (engine RPM above roughly 400) but the input/turbine speed sensor reports zero RPM for 3-5 seconds, which is mechanically impossible unless the sensor has failed, the wiring is open, the tone-wheel/reluctor on the input shaft is damaged, or the torque converter is slipping catastrophically. This is the same diagnostic family as P0715 (which is the generic input speed sensor code), P0717 specifically calls out the no-signal condition rather than a range/performance issue.
Cheapest-first ladder
- scan live data and watch input/turbine RPM against engine RPM with the trans in park, healthy turbine RPM should track engine RPM within 50 RPM at idle with the converter unlocked; drop into drive and watch turbine RPM hold steady around 600-700 in gear while engine sits at 700-800.
- A flat zero reading from the turbine sensor confirms the no-signal condition.
- Verify the sensor connector at the trans case is seated and dry, ohm the sensor (typical inductive pickup is 250-1,500 ohms depending on platform, Hall-effect sensors are not resistance-checkable and require a 12V supply test), and inspect for ATF in the connector.
- Expensive misdiagnosis: do not authorize a transmission R&R for a reluctor-ring inspection until you have actually scoped the sensor signal during a road test, the most common root cause on 80% of platforms is a $40-90 sensor or a $30 connector pigtail, not an internal failure.
Vehicle-specific patterns2004-2009 Cadillac CTS/STS with 5L40E sees P0717 from input speed sensor failures, the sensor is externally serviceable on top of the case; 2007-2012…
- 2004-2009Cadillac CTS/STS with 5L40E sees P0717 from input speed sensor failures, the sensor is externally serviceable on top of the case;
- 2007-2012Nissan Altima/Maxima CVT (JATCO RE0F09/10) throws P0717 from primary pulley speed sensor failure, often alongside P0715 and P0776, NTB11-001 documents the diagnostic flow;
- 2003-2007Honda Accord/Pilot 5AT (B7TA, BAYA) has a chronic 3rd-clutch-pressure-switch and dual-speed-sensor failure pattern where both input and counter shaft sensors fail in sequence.
Estimated repair$180 to $1,400.
Look up another code
P0717 — frequently asked
What does a P0717 code mean?
PCM is not seeing any input speed signal from the transmission.
What causes a P0717 code?
Common causes: Failed input speed sensor; Wiring open; Internal trans issue.
What are the symptoms of a P0717 code?
Typical symptoms: Limp mode (often stuck in 3rd or 2nd); No upshift.
Is it safe to drive with a P0717 code?
Not for long. Driving on this one risks further damage. Get it to a shop rather than carrying on with it. Estimated repair: $200-$1,500.
How do I diagnose a P0717 code?
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed. 1. Note every code that is set, not just this one. 2. Read the freeze frame — the conditions the fault was recorded under. 3. Confirm the fault is current rather than history. 4. Then work the likely-causes list in the order shown.
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